Over the course of the weekend, celebrity film and TV stars hosted question & answer panels or met with fans. Always a highlight at these conventions is cosplay. Check out the gallery below, with photos taken by Nathan Atkins, and featuring guests including Cary Elwes, Aly Michalka, Clare Kramer, Dichen Lachman, Nikolai Nikolaeff, Gates McFadden and Nathaniel Buzolic: